/**
 * 工具函数
 */
function getCookie(name)
{
	var results = document.cookie.match('(^|;) ?' + name + '=([^;]*)(;|$)');
	 
    if (results)
      return (unescape(results[2]));
    else
      return null;
}

function setCookie(name, value, expires, path, domain, secure) {
	var today = new Date();
	today.setTime( today.getTime() );

	if ( expires )
	{
		expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date( today.getTime() + (expires) );

	document.cookie = name + "=" +escape( value ) +
		( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) +
		( ( path ) ? ";path=" + path : "" ) +
		( ( domain ) ? ";domain=" + domain : "" ) +
		( ( secure ) ? ";secure" : "" );
}